Power socket with overvoltage protection function for electrical device

Abstract

The invention discloses a power socket with the overvoltage protection function for an electrical device. The power socket with the overvoltage protection function for the electrical device is characterized by comprising a 220V alternating-current power supply, a fuse FU, a clutter pulse absorption circuit and a bidirectional triode thyristor triggering and power output circuit, in the clutter pulse absorption circuit, the live wire end L of the 220V alternating-current power supply is connected with one end of a voltage dependent resistor MY through the fuse FU, the other end of the voltage dependent resistor MY is connected with the null line end N of the 220V alternating-current power supply, and the bidirectional triode thyristor triggering and power output circuit is composed of a bidirectional triode thyristor BCR, a resistor R1, a resistor R2, a resistor R3 and a power socket body CZ. A large number of electrical devices do not have the mains supply overvoltage protection function, and serious safety dangers exist when the electrical devices are used under the emergency situations that the voltage of the 220V alternating-current power supply is larger than 250V or phase dislocation (380V) occurs. According to the power socket with the overvoltage protection function for the electrical device, the power socket can act rapidly under the condition of overvoltage or phase dislocation, the fuse fuses rapidly, and then the electrical device is protected effectively.

Description

technical field [0001] The invention belongs to the technical field of electronics and electric engineering, and relates to an electrical equipment overvoltage protection power socket. Background technique [0002] Many electrical equipment itself does not have the overvoltage protection function of mains power, such as: refrigerators, washing machines, computers, audio and other electrical equipment, encountering prominent problems such as 220V AC power supply voltage exceeding 250V or wrong phase (380V), which will affect the electrical equipment. How to avoid the extreme phenomenon of burning out electrical equipment due to excessive mains voltage? [0003] This requires that the action speed of the protective device must be faster than the working speed of the power supply of the electrical equipment in order to be effectively protected. For example, most of the protective devices designed for color TVs on the market cannot do this, and things that burn out color TVs du...

AI Technical Summary

Problems solved by technology

The reason is mostly that the color TV has been damaged before the protective device has acted.

Images